Does occupational exposure to brown coal dust cause a decline in lung function?

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      <subfield code="a">To determine if the rate of change in forced expiratory volume in one second in subjects with high exposure to Latrobe Valley brown coal dust was significantly greater than the rate of change among subjects with low exposure</subfield>
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      <subfield code="g">Vol. 54, nº 9, September 1997 ; p. 642-645</subfield>
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